Question

Help with the second step? And is the first step right?

Answer 1

so first find the common ratio r

r = 2nd term/ 1st term = 3rd term/ 2nd term = ...so on

Answer 2

1.2/.8=
1.5
1.8/1.2=
1.5

Answer 3

yes
r = 1.5

now use the general formula
\(a_n = a_1 r^{n-1}\)

Answer 4

here you need 6th term!
because starting is 0 hours
so plug in n =6 !

Answer 5

a_n=a_1 r^n-1
a_n=0.8 1.5^n-1
a_n=0.8 1.5^6-1
a_n=0.8 1.5^5
a_n=0.8 (7.59375)
a_n=6.075

Answer 6

Is that right?

Answer 7

correct :)

Answer 8

but thats the final number
the formula, which is asked is is
\(\Large a_n = 0.8 \times (1.5)^{n-1} \)

Answer 9

I know lol thanks!

Answer 10

welcome ^_^